I’ve had toon boom for about a year now the pen pressure has never worked. I use a HUION tablet (fully updated driver, pen pressure sensitivity works with Adobe and all other programs). I’ve checked the minimum and maximum size of my brush and I’ve deleted and reinstalled the program multiple times.
In the Harmony Preferences under the Advanced Tab, Uncheck ‘Use Qt Wintab Tablet Support’, click ok and then quit and reopen Harmony.
I’ve tried that too, multiple times. Thank you though!